Приказ основних података о документу
The crystallization and optical properties of LiNbO3 single crystals
Kristalizacija i optičke osobine monokristala LiNbO3
dc.creator | Golubović, Aleksandar | |
dc.creator | Gajić, Radoš | |
dc.creator | Nikolić, Slobodanka | |
dc.creator | Djurić, Stevan | |
dc.creator | Valčić, Andreja | |
dc.date.accessioned | 2020-04-27T00:41:52Z | |
dc.date.available | 2020-04-27T00:41:52Z | |
dc.date.issued | 2000 | |
dc.identifier.issn | 0352-5139 | |
dc.identifier.issn | 1820-7421 | |
dc.identifier.uri | https://cer.ihtm.bg.ac.rs/handle/123456789/3498 | |
dc.description.abstract | LiNbO3 single crystals were grown by the Czochralski technique in an air atmosphere. The critical crystal diameter Dc = 1.5 cm and the critical rate of rotation wc = 35 rpm were calculated from the dynamic of fluids equations for buoyancy-driven and forced convections under which the shape of the melt/crystal interface changed. The domain inversion was carried out at 1473 K using a 10 min 3.75 V/cm electric field. The obtained crystals were cut, polished and etched to determine the presence of dislocations and single domain structures. The lattice parameters a = 0.51494 nm, c = 1.38620 nm and V = 0.3186 nm 3 were determined by X-ray powder diffraction. The optical properties were studied by infrared spectroscopy in the wave number range 20 5000 cm -1 . With decreasing temperature, an atypical behaviour of the phonon modes, due to the ferroelectric properties of LiNbO3 single crystal, could be seen. The optical constants were calculated by Kramers-Kronig analysis and the value of the critical temperature was estimated. The obtained results are discussed and compared with published data. | en |
dc.description.abstract | Monokristali LiNbO3 su dobijeni metodom rasta kristala po Čohralskom na vazduhu.Iz jednačina dinamike fluida za termičku i forsiranu konvekciju izračunati su kritični prečnik kristala Dc = 1,5 cm i vrednost kritične brzine rotacije wc = 35 o/min pri kojima dolazi do promene oblika fronta kristalizacije. Monodomenizacija je obavljena na temperaturi od 1473 K, pri električnom polju od 3,75 V/cm u trajanju od 10 minuta. Dobijeni kristali su sečeni, polirani i nagrizani da bi se odredilo prisustvo dislokacija i dobijanje monodomenske strukture. Rendgenskom difrakcijom praha odredjeni su parametri jedinične ćelije a = 0,51494 nm , c = 1,38620 nm i zapremina V = 0,3186 nm 3 .Optičke osobine su proučavane u infracrvenoj oblasti spektra u opsegu talasnih brojeva od 20–5000 cm –1 . Refleksioni spektri su snimani na različitim temperaturama da bi se posmatrao položaj fononskih modova. Sa opadanjem temperature može da se vidi atipično ponašanje fononskih modova što se pripisuje feroelektričnim osobinama monokristala LiNbO3. Optičke konstante monokristala LiNbO3 su dobijene korišćenjem Kramers-Kronig analize i procenjena je vrednost kritične temperature.Dobijeni rezultati su diskutovani i uporedjivani sa podacima iz literature. | sr |
dc.language.iso | en | sr |
dc.publisher | Belgrade : Serbian Chemical Society | sr |
dc.rights | openAccess | sr |
dc.rights.uri | https://creativecommons.org/licenses/by-nc-nd/4.0/ | |
dc.source | Journal of the Serbian Chemical Society | sr |
dc.subject | Czochralski technique | sr |
dc.subject | lithium niobate | sr |
dc.subject | single crystals | sr |
dc.subject | optical properties | sr |
dc.title | The crystallization and optical properties of LiNbO3 single crystals | en |
dc.title | Kristalizacija i optičke osobine monokristala LiNbO3 | sr |
dc.type | article | sr |
dc.rights.license | BY-NC-ND | sr |
dcterms.abstract | Гајић, Радош; Дјурић, Стеван; Валчић, Aндреја; Голубовић, Aлександар; Николић, Слободанка; Кристализација и оптичке особине монокристала ЛиНбО3; Кристализација и оптичке особине монокристала ЛиНбО3; | |
dc.citation.volume | 65 | |
dc.citation.issue | 5-6 | |
dc.citation.spage | 391 | |
dc.citation.epage | 397 | |
dc.citation.rank | M23 | |
dc.description.other | Dedicated to Professor Slobodan Ribnikar on the occasion of his 70th birthday | en |
dc.identifier.doi | 10.2298/JSC0006391G | |
dc.identifier.fulltext | https://cer.ihtm.bg.ac.rs/bitstream/id/16367/JS5_6-13.pdf | |
dc.identifier.scopus | 2-s2.0-0034365786 | |
dc.identifier.wos | 000087397100015 | |
dc.type.version | publishedVersion | sr |